//
//  ColorUtility.m
//  微博个人主页
//
//  Created by zenglun on 16/5/5.
//  Copyright © 2016年 chengchengxinxi. All rights reserved.
//

#import "ColorUtility.h"

@implementation ColorUtility

+ (UIColor *)colorWithHexString:(NSString *)stringToConvert {
    
    if(stringToConvert == nil || [stringToConvert isEqualToString:@""]){
        return nil;
    }
    NSString * cString = [[stringToConvert stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
    
    // String should be 6 or 8 characters
    //if ([cString length] < 6) return DEFAULT_VOID_COLOR;
    
    // strip 0X if it appears
    if ([cString hasPrefix:@"0X"]) cString = [cString substringFromIndex:2];
    if ([cString hasPrefix:@"#"]) cString = [cString substringFromIndex:1];
    //if ([cString length] != 6) return DEFAULT_VOID_COLOR;
    // Separate into r, g, b substrings
    NSRange range;
    range.location = 0;
    range.length = 2;
    NSString *rString = [cString substringWithRange:range];
    
    range.location = 2;
    NSString *gString = [cString substringWithRange:range];
    
    range.location = 4;
    NSString *bString = [cString substringWithRange:range];
    
    // Scan values
    unsigned int r, g, b;
    [[NSScanner scannerWithString:rString] scanHexInt:&r];
    [[NSScanner scannerWithString:gString] scanHexInt:&g];
    [[NSScanner scannerWithString:bString] scanHexInt:&b];
    //NSLog(@"%f:::%f:::%f",((float) r / 255.0f),((float) g / 255.0f),((float) b / 255.0f));
    
    return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:1.0f];
}

@end
